Lab-on-Fiber Technology: Toward Multifunctional Optical Nanoprobes
Lab-on-Fiber Technology: Toward Multifunctional Optical Nanoprobes
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DOI：
10.1021/nn204953e
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发表时间：
2012-04-01
期刊：
影响因子：
17.1
通讯作者：
Cusano, Andrea
中科院分区：
文献类型：
--
作者：
Consales, Marco;Ricciardi, Armando;Cusano, Andrea
我们提出了一种可靠的制造工艺，使介电和金属纳米结构的光纤尖端的集成，从而代表了在“光纤实验室”技术路线图的进一步步骤。所提出的制造过程涉及传统的沉积和纳米图案化技术，通常用于平面器件，但这里适用于直接在光纤尖端上操作。按照这种方法，我们展示了第一个技术平台的基础上集成到光纤尖端的二维混合金属-介电纳米结构，支持本地化的表面等离子体共振。通过实验测量和全波数值模拟，我们描述了这些共振现象，并探讨了潜在的物理。我们表明，共振可以很容易地调谐通过作用的物理和几何参数的结构。此外，考虑到可能的应用，我们提出了一些初步的结果表明，所提出的设备可以有效地作为一个光学探针的无标记的化学和生物传感以及用于声波检测的麦克风。
We propose a reliable fabrication process enabling the integration of dielectric and metallic nanostructures on the tip of optical fibers, thus representing a further step In the "lab-on-fiber" technology roadmap. The proposed fabrication procedure involves conventional deposition and nanopatterning techniques, typically used for planar devices, but here adapted to directly operate on optical fiber tip. Following this approach, we demonstrate a first technological platform based on the integration onto the optical fiber tip of two-dimensional hybrid metallo-dielectric nanostructures supporting localized surface plasmon resonances. By means of experimental measurements and full-wave numerical simulations, we characterize these resonant phenomena and investigate the underlying physics. We show that resonances can be easily tuned by acting on the physical and geometrical parameters of the structure. Moreover, with a view toward possible applications, we present some preliminary results demonstrating how the proposed device can work effectively as an optical probe for label-free chemical and biological sensing as well as a microphone for acoustic wave detection.